| // Copyright 2022 The Go Authors. All rights reserved. | 
 | // Use of this source code is governed by a BSD-style | 
 | // license that can be found in the LICENSE file. | 
 |  | 
 | //go:build !goexperiment.pagetrace | 
 |  | 
 | package runtime | 
 |  | 
 | //go:systemstack | 
 | func pageTraceAlloc(pp *p, now int64, base, npages uintptr) { | 
 | } | 
 |  | 
 | //go:systemstack | 
 | func pageTraceFree(pp *p, now int64, base, npages uintptr) { | 
 | } | 
 |  | 
 | //go:systemstack | 
 | func pageTraceScav(pp *p, now int64, base, npages uintptr) { | 
 | } | 
 |  | 
 | type pageTraceBuf struct { | 
 | } | 
 |  | 
 | func initPageTrace(env string) { | 
 | } | 
 |  | 
 | func finishPageTrace() { | 
 | } |